Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6038306 | Method and application means for establishing performance features in private communication systems of a public communication network | Siegfried Spahl, Dietmar Ratzberger, Friedrich Kopitar | 2000-03-14 |
| 5999607 | Method and apparatus for restricting dialing authorization in communication devices | Siegfried Spahl | 1999-12-07 |
| 5864624 | Method for activating and executing protected functions in a communication system | Friedrich Ramberger, Peter Giese, Siegfried Spahl | 1999-01-26 |
| 5412781 | Method and arrangement of buffer allocation in communication systems by employing fixed and dynamic buffer allocation functions | Friedrich Ramberger, Siegfried Spahl | 1995-05-02 |